Disassembly Xiaomi Redmi 9A: a complete guide with photos and tips

Why to Disassemble Redmi 9A and What to Know Before You Start

Xiaomi Redmi 9A is one of the most popular budget phones on the market, but even it is not immune to breakdowns. Disassembly of the device may be necessary to replace the battery, repair the charging connector, clean from dust or recover from a fall. However, improper disassembly often leads to damage to the plumes, the failure of the screws or even the complete failure of the phone.

Before you start, consider that the Redmi 9A is not designed to be self-repaired, its body is glued together, and many elements (for example, the battery) are soldered to the board. If you are not sure about your skills, you should contact the service center, but if you decide to disassemble yourself, this guide will help to do everything carefully.

In the article you will find:

• 🔧 List of tools with alternatives for home conditions
• 📸 Step-by-step photos of each stage of disassembly
• ⚠️ Common Mistakes and How to Avoid Them
• 🔄 Tips for Assembly after Repair

Redmi 9A Disassembly Tools: What is Necessary and What You Can Do Without

The Xiaomi Redmi 9A will require a minimal set of tools to disassemble, but some are critically important. Without a plastic blade, for example, you are almost guaranteed to damage the plumes, and without a suction cup, removing the back cover will be extremely difficult.

Here's the full list:

Important: The screws in the Redmi 9A are of different lengths - don't confuse them when you build them! It's better to spread them in order on a piece of paper or use a magnetic mat.

⚠️ Warning: If you don't have an antistatic bracelet, touch a grounded metal object (such as a heating battery) with your hand before work.

Step 1: Removing the back cover - how not to break the latches

The Redmi 9A's back cover is glued around the perimeter and is held on plastic latches, and the main goal is to separate it evenly without damaging the mounting. Start by heating the body, which will soften the glue and reduce the risk of cracking.

Instructions:

1. Turn off the phone and remove it. SIM-memory-card.
2. Then, put the suction cup on the bottom of the lid (near the charging connector).
3. Pull the sucker with a force of ~5-7 kg, while putting the edge on with a plastic spatula.
4. As soon as the gap appears, swipe the perimeter, separating the glue.

If the lid doesn't lend itself:

• 🔥 Heat the body with a hair dryer (temperature) ~50°C) within 1-2 minutes.
• 🧊 Alternative: Put your phone in a warm water bag (not boiling water!) for 5 minutes.
• 🔧 Don’t use metal tools – they leave scratches.

A common mistake is that many people try to remove the lid from the top (where the camera is), but there is more glue, and the risk of breaking the latches is higher. Always start at the bottom!

Step 2: Shutting off the battery – why do you need to do it before doing the rest of the work?

The battery in the Redmi 9A is connected to the motherboard via a connector, and if you don't disconnect it before you disassemble it, you run the risk of shortening the board if you accidentally touch it with a screwdriver or tweezer, which is one of the main reasons for the phones to "fill" after self-repairing.

How to turn off the battery:

1. After removing the lid, you will see a battery with a black connector at the top.
2. Carefully put the jack on a plastic spatula and pull it up. Don't pull the wires!
3. Make sure the connector contacts are not bent - if so, straighten them with tweezers.

⚠️ Warning: If the battery is swelling (the lid is bubbling), don't try to puncture or bend it. Bloated Li-ion batteries can ignite.

After turning off the battery, wait 1-2 minutes - this will discharge the residual capacitors on the board.

Step 3: Removing the motherboard – where the “traps” are located

The Redmi 9A motherboard is mounted on 8 screws and multiple plumes, and the challenge is not to mix the screws and break the plumes when you extract them, and you can use a magnetic mat or screw layout.

Procedure:

1. Unscrew all the screws (marked with red circles in the photo below) The screws of the speaker and vibrator are longer than the others!
2. Disconnect the plumes: 📱 Main display (top, under metal screen) 🔊 Dynamics plume (right, under the paycheck) 📷 Camera plume (left, taped)

Then, make sure you are on the right side and take it out.

Traps that many people don’t know about:

• 🧲 Screw under SIM-tray often forget to unscrew - the fee is not removed, and the beginner begins to pull it with effort.
• 🔌 The camera plume is glued to the board with tape - do not pull it, but first dent the scotch.
• 🔊 The speaker can remain on the board or on the lid - depends on the modification of the phone.

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If the board is not taken out, make sure you have forgotten the screw under the IMEI sticker.It is often overlooked and it blocks the extraction.

Step 4: Disassemble the remaining components – what can be replaced by yourself

Once the board is removed, you get access to all the main components of the Redmi 9A. Here’s what you can replace or clean without special skills:

The most common replacement is the battery.

1. Unplug the old battery with a plastic spatula. If it's glued heavily, use isopropyl alcohol.
2. Clean the site of glue residues with alcohol and a napkin.
3. Stick the new battery to double-sided tape (don’t use superglue!).
4. Connect the connector and check the charging before assembly.

Important: If the phone doesn’t turn on after the battery is replaced, check:

• 🔌 Is the connection properly connected (whether the contacts are bent).
• 🔋 Are the battery contacts closed (check the multimeter).
• 🔧 Whether all the board screws are twisted (untwisted screws can close the board).

Phone Assembly: How to Avoid Errors and Check Out Your Operability

Building a Redmi 9A is as important as disassembling, and the rule of thumb is to do it in reverse, but with nuances in mind.

Checklist before assembly:

Typical errors in assembly:

• 🔊 Forget to connect the plume speaker – the phone turns on, but no sound.
• 📶 Do not twist the screws of the antenna — lost network or Wi-Fi.
• 🔋 Confusing screws - long screws can break the board.

After assembly, be sure to check:

1. If the phone is switched on (hold the Power button for 10-15 seconds).
2. Does the touchscreen work (check all screen areas).
3. Whether the battery is charged (plug in charge for 30 minutes).
4. Is there sound in the speaker and microphone (record a voice note).

⚠️ Warning: If the phone overheats or discharges quickly after assembly, chances are you forgot to plug in the antenna plume or installed the battery incorrectly.

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The most common cause of a phone that doesn't work after assembly is an unconnected plume of a display or battery. Always double-check the connectors!

Frequent questions about the dismantling of Xiaomi Redmi 9A